Research And Implementation Of Key Technologies On Traffic Engineering For Underground Communication Network Based On SDN

It can be seen from the frequently reported mining accidents that our country now is faced with severe safety issue in production during the mid-point of economic and industrial development.In addition to improving the safety awareness of staff,we should use the safety production science and technology to improve the level of safety in production fundamentally.When the cable line is damaged,underground wireless communication technology ensure the smooth process of data transmission.However,the current underground wireless communication situation in the network is jammed frequently.Traffic engineering is an important mechanism to optimize the performance of a data network by dynamically analyzing,predicting,and adjusting the behavior of data transmission.But,there are a lot of shortcomings of the existing traffic engineering research.For example,the existing traffic engineering cannot make full use of network resources.Therefore,a new network architecture and a more intelligent and efficient traffic engineering technology is needed.Software Defined Network(SDN)is an emerging networking framework that separates the network control plane from the data forwarding plane.The control plane of SDN can collect information of the whole network,which can fine-grained regulate the traffic and increase the performance of traffic optimization.Firstly,for SDN routers fully and partially configured scenario,the rational allocation of network link weights will transform the load balancing problem to the minimizing path weight problem.And we use the Dijkstra algorithm which is the solution of the shortest path problem to figure it out.Then,we study the placement of the SDN routers and propose a SDN router placement algorithm based on greedy strategy.By optimizing the placement of SDN routers,the SDN routers partial configuration network can achieve load balance.After these,we studied route switching policy under SDN routers partial configuration comprehensively considering the routing hop and load balance.Through considering the load balancing and business flow forwarding routing hop,we propose balance factor as a new link weight.Finally,thesis studies the interference of underground wireless network under the SDN partial router configuration.In order to verify the performance of these algorithms,a large number of simulations are carried out on the Visual Studio platform.The results show that compared with the traditional routing algorithm;(1)The load balancing performance in different types of traffic matrix has been enhanced in SDN routers fully and partial configuration;(2)SDN router placement algorithm based on greedy algorithm ensures the SDN routers are deployed in a better position in the Wireless Mesh Network;(3)Considering the routing hop and load balance comprehensively and choosing the link with relatively small hop and load to route;(4)Considering the interference under Underground Wireless Network scenario and integrating network interference and load balancing.Finally,we come to the conclusion that avoid interference may sacrifice load balancing.